- Obituary (1616 Hits)
- Obscurity (2754 Hits)
- Officium Triste (1265 Hits)
- Omission (1172 Hits)
- Omnium Gatherum (72 Hits)
- Onheil (759 Hits)
- Onkel Tom Angelripper (807 Hits)
- Onslaught (1446 Hits)
- Oppressus (1432 Hits)
- Orae (1299 Hits)
- Orden Ogan (1218 Hits)
- Out For Blood (860 Hits)
- Outrage (JPN) (298 Hits)
- Overkill (1176 Hits)
- Ozzy Osbourne (1336 Hits)